Was thinking about this today, and I have a hard time thinking up what under $10 game I've spent the most amount of hours on. If pressed I would guess Adventure Quest, which is a browser based RPG (maybe an MMO?) What about you guys?

I can't really tell which one from the two I spend the most time, but under 10 $ games that I played more than I should (way more) would be Original War and Heroes 3. Amazing games a specially Orignal War which in my opinion bounds RTS and RPG almost perfectly.